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August 24^th 2022 - Guides

Install a VNC service to remotely access a Linux server

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Install a VNC service to remotely access a Linux server

Virtual Network Computing or VNC is a system for viewing and controlling the desktop environment of a remote computer. This system is used to facilitate access and display of data processing** that only work from a graphical interface. It allows you to connect to a dedicated server at Aqua Ray through a graphical interface.
Here are the necessary steps for this installation.

Prerequisites to start the installation

An operational Linux server;
A graphical interface installed on the server. We recommend the use of XFCE;
A VNC client on your workstation.

Installation of the VNC server

We recommend TigerVNC. Under Debian and derivatives, these are the packages « tigervnc-standalone-server » et « tigervnc-scraping-server »:
apt install tigervnc-standalone-server / tigervnc-scraping-server

Configuration of the VNC service

For this article, we will use « oliv » to refer to the system user whose graphical session you want to use.

First of all, make sure that « oliv » can start services that remain active after its disconnection:
loginctl enable-linger oliv
The following operations must be performed with « oliv ».
Connect to your server as « oliv »:
ssh -l oliv addresse.du.serveur
Create the folder that will contain the service configuration:
mkdir -p ~/.config/systemd/user/
Create the configuration file for the :
nano ~/.config/systemd/user/x0vncserver.service

Content should be:
[Unit] Description=Remote desktop service (VNC) After=syslog.target network.target [Service] Type=forking ExecStart=/usr/bin/sh -c '/usr/bin/x0vncserver -display :0 -rfbport 5900 -passwordfile /home/oliv/.vnc/passwd &' Restart=on-failure [Install] WantedBy=multi-user.target
Create the folder that will contain the password file:
mkdir /home/oliv/.vnc/
Create the file that will contain the VNC password:
vncpasswd /home/oliv/.vnc/passwd
Make sure that the new configuration is taken into account by systemd :
systemctl --user daemon-reload
Start the VNC server:
systemctl --user start x0vncserver.service

The server listens on port 5900 by default. It is possible to change it from the file ~/.config/systemd/user/x0vncserver.service. Don't forget to reload the systemd configuration after each modification.

Connection to the server in VNC

To connect to the server, enter the address of your server and the port number (5900). You will also be asked for a password, it is the one you defined before with « vncpasswd ».

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